noctilucent

Earth’s Highest Clouds Shine at the “Top of the Orbit”

Looking for a new desktop background? This might do nicely: a photo of noctilucent "night-shining" clouds seen above a midnight Sun…

11 years ago

An Early Start for Noctilucent Clouds

The season for noctilucent "night-shining" clouds is arriving in the northern hemisphere, when wispy, glowing tendrils of high-altitude ice crystals…

11 years ago